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Finding the Fourth Proportional to 5,661.20, 8,478.12 and 2,880.56

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Solution

The fourth proportional to 5,661.20, 8,478.12 and 2,880.56 is: 4,313.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,661.20 : 8,478.12 = 2,880.56 : x
  2. Step 2: Convert to fraction form
    5,661.20/8,478.12 = 2,880.56/x
  3. Step 3: Cross multiply
    5,661.20x = 8,478.12 × 2,880.56
  4. Step 4: Simplify right side
    5,661.20x = 24,421,733.35
  5. Step 5: Solve for x
    x = 24,421,733.35/5,661.20
  6. Step 6: Final answer
    x = 4,313.88

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.